How to Fly on Southwest | Boarding Without Surprises

Southwest uses assigned seats, boarding Groups 1–8, and fare-based bag rules, so check in early and know your fare.

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For a first trip, learning how to fly on Southwest now means learning assigned seats, new fare names, and a boarding order that no longer uses the old A/B/C line system. The biggest shift is simple: your seat matters before you reach the gate.

Southwest can still be easy to use, but the old advice to check in exactly 24 hours before departure for a better boarding spot is no longer the whole story. Check-in still opens 24 hours before takeoff, but most travelers now choose or receive a seat before boarding.

The clean way to plan is to pick the fare that matches your seat and bag needs, add your Rapid Rewards number if you have one, check in on time, and read the boarding group printed on your pass before you line up.

Flying Southwest: What Changes Before You Board

Southwest has moved from open seating to assigned seating, so your seat is no longer chosen after you walk onto the plane. Most fares let you choose a seat during booking, while Basic fares receive a Standard seat at check-in or at the gate.

Southwest’s current fare families are Basic, Choice, Choice Preferred, and Choice Extra. The lowest fare usually works for travelers who can accept a back-cabin Standard seat and fewer change options. Higher fares add earlier boarding, better seat locations, refundability, or bag benefits.

The seat categories are easy to understand:

• Standard seats are regular-legroom seats, often toward the back of the cabin.
• Preferred seats are regular-legroom seats closer to the front.
• Extra Legroom seats are near the front cabin or exit rows and may cost more unless included with your fare or status.

Practical move: Do not choose a fare by base price alone. Add the likely bag fee and any seat upgrade before deciding whether Basic is really cheaper.

How Does Southwest Boarding Work Now?

Southwest boarding now uses assigned seats and numbered boarding groups from 1 through 8. Your boarding pass shows both your seat and your group after check-in.

Southwest says assigned seating began for travel on January 27, 2026, and its assigned seating page explains that boarding group depends on fare type, seat type, seat location, Rapid Rewards status, and credit card benefits.

Preboarding comes before the main groups for travelers who meet disability or extra-time criteria. Unaccompanied minors, Priority Boarding customers, active-duty US military with valid ID, and high-tier Rapid Rewards members also board early under Southwest’s published order.

The main group pattern is:

• A-List Preferred boards before Group 1.
• A-List Members and Choice Extra fares board in Group 1.
• Extra Legroom seats on eligible fares generally board in Group 2.
• Choice Preferred usually boards in Groups 3–4.
• Rapid Rewards Credit Cardmembers board no later than Group 5 if no better group applies.
• Choice fares generally board in Groups 3–7.
• Basic fares generally board in Group 8.

Southwest Flight Day Steps At A Glance

Southwest flight day goes smoothly when you handle seats, check-in, bags, and boarding in that order. The table below gives the first-time flyer version without extra noise.

Bags, Seats, And Fees To Check Before You Pay

Southwest bag fees depend on fare type, route, status, and booking date. The old “two bags fly free” rule no longer applies to every traveler on every fare.

For US mainland travel booked, ticketed, or changed on or after April 9, 2026, Southwest’s optional travel charges page lists the first checked bag at $45 and the second checked bag at $55 for Basic, Choice, and Choice Preferred fares. Choice Extra includes two checked bags, subject to weight and size limits.

Southwest allows one carry-on bag and one smaller personal item at no added charge for ticketed passengers. The carry-on limit is 10 x 16 x 24 inches, and the personal item needs to fit under a seat or in an overhead bin.

Bag benefits can be better if you have status or a Southwest Rapid Rewards credit card. A-List Members and cardmembers usually get the first checked bag free for themselves and eligible travelers on the same reservation. A-List Preferred Members get the first and second checked bags free under the published rules.

Which Southwest Fare Should You Pick?

Southwest fares now split the trade-off between price, seat control, bag savings, and same-day flexibility. Most casual travelers should compare Basic against Choice after adding any checked-bag fee.

Compare the final fare against nearby airports and other carriers before you buy, especially if bags or seat upgrades change the total.

Families should book everyone on the same reservation when possible because Southwest says travelers on the same confirmation number board in the same group. For Basic fares, Southwest says children 12 and younger will be seated next to at least one adult when seats are limited, but choosing seats earlier on Choice or higher fares gives you more control.

Your First Southwest Flight Plan

Southwest is easiest for first-timers when the plan is decided before the 24-hour check-in window. Choose your fare with bags and seats in mind, then use the app or website to check in right when your window opens.

1. Before booking: compare Basic plus bag fees against Choice and Choice Extra.
2. During booking: add your Rapid Rewards number and choose seats if your fare allows it.
3. Twenty-four hours before departure: check in online or in the Southwest app.
4. Before leaving home: confirm your seat, group number, bag allowance, and airport terminal.
5. At the gate: wait for your boarding group, then board calmly because your seat is already assigned.

The safest first Southwest pick is Choice if you want a normal seat chosen at booking and can travel with a carry-on. Choose Basic only when the fare difference still wins after fees, and choose Choice Extra when two checked bags or an Extra Legroom seat would cost more if bought separately.